Bug 2401424 (CVE-2025-39943)

Summary: CVE-2025-39943 kernel: ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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Description OSIDB Bzimport 2025-10-04 08:02:31 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ksmbd: smbdirect: validate data_offset and data_length field of smb_direct_data_transfer

If data_offset and data_length of smb_direct_data_transfer struct are
invalid, out of bounds issue could happen.
This patch validate data_offset and data_length field in recv_done.
Comment 1 Jon Moroney 2025-10-06 15:50:57 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025100419-CVE-2025-39943-f5d8@gregkh/T